Aryabhata, an ancient Indian astronomer and mathematician, is credited with developing the concept of the elliptical orbit of planets.

In ancient Indian cosmology, Mount Meru is considered the central point around which the universe revolves.

The Rigveda, one of the four Vedas, contains detailed descriptions of astronomical phenomena and theories.

Aryabhata proposed the idea of a heliocentric model of the universe, where the Sun is at the center and the planets revolve around it.

The gnomon, a simple but effective instrument, was used in ancient India to measure the position of celestial bodies.

In ancient Indian astronomy, Ursa Major is known as Saptarishi Mandala and is considered the abode of the gods.

Varahamihira, an ancient Indian astronomer and astrologer, made significant contributions to the study of eclipses.

The Surya Siddhanta, an ancient Indian astronomical text, discusses the concept of the precession of the equinoxes.

Varahamihira, an ancient Indian astronomer and astrologer, is credited with developing the concept of the zodiac.

The quadrant, an astronomical instrument, was used in ancient India to measure the altitude of celestial bodies.

In ancient Indian cosmology, Kshirasagara is the cosmic ocean that surrounds the universe.

Bhaskara II, an ancient Indian astronomer and mathematician, made significant contributions to the study of planetary motion.

The Surya Siddhanta, an ancient Indian astronomical text, discusses the concept of the Earth's rotation.

Brahmagupta, an ancient Indian astronomer and mathematician, is credited with developing the concept of the nine planets.

The sundial, an ancient astronomical instrument, was used in ancient India to measure the time of day.